Electric toothbrush



FIG. 1 is a perspective view of an electric toothbrush;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an electric toothbrush, as shown and described. 